Chair



' F. KOENIGKRAMER June 16, `19254.

CHAIR Filed Az. 2. 1922 2 Sheets-Sheet l attenua* June 16,5 1925.1,542,508 F. KOENIGKRAMER f CHAIR Filed Aug. 2. 1922 lSheets-Sheet 2iatented June 16, 1925. f il f;

unirsi) STATES t 1,542,508 vPafrlL-rv'r OFFICE.'

'FREDERICK lKOENIGr'KRAB/LER, OF CINCINNATI, OHIO.`

' CHAIR.

.` Application filed August V2,1922.v Serial No. 579,195.

of chiropodists, and ffor similar purposes,

as for instance, for Optometrists, and for minor `surgical operations.`Another object is to provide improvedchair seat and "back adjustingapparatusl Another objectfis vto `provide improvedymeans toy cushion andlock the 4adjustments ofthe chair seat relative to the'fbaseAnother'object isto providean' improved foot rest `for chiropodists andsurgical purposes. Another object is to provide improved'means tovsupport and adjust a head-rest'fup'on and relative tothe chair. Anotherobject is to provide improved foot rest adjusting apparatus. Myinvention also comprises certain .details of form and relation `ofcomponent members, all 'olf which will 'befu'lly set forth in thedescription of theaccom'panying drawings, in which:

Fig. 1, `is a side elevation of a chair embodying mycimprovements.

Fig. 2, is afront elevation of lthe same with the foot restdetach'ed;

lilig. "3, is aA front 'elevation of the foot rest detached. p n j Fig.4, .is a side elevation of the vfoot rest detached, showin onemet-hodofits appli.- cation, an'dparty,A indicating itsJra-nge of adjustifient.'`j Y j j j Fig 5, visa ,plany of'the chair seat with the seat, cushiondetached.

Fig; 6,' Ais :ia sectional 'detail taken on line 6-6 of Fig. 5.

.Fig.f7, is 'afdetail ofthe head-rest ad` justing land clampingv means.

The laccompanying drawings illustrate the preferred'emhodinfientsr r'ofmy invention in which 15 represents a chair base, preferably providedzwith' `a vertical cylinder lltorece'ive a hydraulic plunger or'stanilftrdV 17 uponwhichthe chair seat, back., arms and foot rest yareall mounted, and which/enables said parts -Ito all be "adj ustedtogether to different rpositions vertically through'lthey movementso-fsaid plunger very'tically in said cylinder. Said plunger with thechair members carried vthereby is also rotatably adjustable within vthecylinder, and -a collar 1S mounted upon the upper end of the cylinderand provided with a set screw 19 and a brake shoe 20 to engage the faceof theplunger while the collar 18 is clamped to the exterior' of thecylinder both vby the action of the set screw 19, provides for `rigidlylocking the plunger against 'either movement relative to the base.

An actuating shaft 21y provided with a hand lever 22 is journaled inj'bearings23 at the upper end of the plunger 17. A crank arm 24carriedby the shaft 21 actuates a hydraulic pump carried by and at thelower end of the plunger 17 to pump a liquid from a reservoirv in theplunger 17 into the space within the cylinder below the plunger throughone portion of the rotation. ofthe shaft 21, and to open. valvemechanism to return theliquid to its reservoir in the plunger at anotherposition rotarily of shaft 21.

The shaft 21 also serves as a hinge axle by means of which the chairseat, back, arms and foot rest may all 'be' adjusted 1f tata-bly to avariety lof positions relative to the plunger -17,` by reason of saidshaft 21 being also "journaled in bearings 23 carried by the chair seatframe 25. In order to limit the rotary movement of the seat frame 25relative to the shaft 21 I provide a toothed segment 2o attachedrigidlyV to the seat frame 25 vprovided lwith two long teeth 27 atopposite ends and a plurality of shorter spaced teeth 28 intermediate ofthe teeth 27. A latch bar 29 `is pivotally mounted at 30 on the bracket31 carried rigidly-by the upper end of the plunger 1'7. Theopposite endof said latch bar is connected by a. linlr32 with a projection 33carried by a yoke 34, which yoke 34 is journaled upon the shaft 21l andprovided with an actuating lever by means of y which ,said vlatch barmay ber shifted into and out `of, engagement with the spaced teeth 28torelea-se; and adjust the chair relative to shaft21 and tolocl thechair to any adjusted position. The latch bar 29 can not be moved out ofthe path 'of thetwo long,` teeth 27, which thereby predetermine andlimit the rotary adj ust-ment of the chair seaty upon the shaft 21. Thefree end of latch bar 29 is supported by guide. 31.

To cushion the rotary adjustment of the chair seat upon the shaft 2l.and thereby avoid sudden and severe shocks a rod 36 is attached rigidlyto the seat trame 25 and is threaded through a slot in an arm 37projecting from the bracket 3l. A coiled spring 38 and washer 39 cushionthe chair movement at one extreme o't the chair movement as the seat istilted forwardly, and a coiled spring 39 and nut 40 and washer 4lcushion the chair movement the seat is tilted rearwardly, therebyabsorbing the shock and tending to counterbalanee the weight of thechair as it is tilted rearwardly. A spring actuated plunger 4Q,pivotally attached to the latch bar 2S) and withits spring 43 engagingthe bracket B1, serves to continuously torce the latch bar intoengagement with the teeth 28 of segment 2G except when said latch bar isretracted by hand through the lever 35, to thereby prevent excessive oraccidental movement ot' seat rotatably relative to the shaft't 2l.

Chair arms 4 4- are independently attached to the seat frame by means ofbrackets 5. The chair back 46 is hinged at 4:7 to the seat trame, and isadjustable relative to the seat frame through a range of movement fromsubstantially the full line vertical position shown in Fig. 1 to thesubstantially horizontal dotted line position shown in. Fig. l. A. bar4:8 is pivotally attached at t9 to the rear of the chair back, and saidbar is passed through a correspondingly shaped slot in a latch member:'i() which latch member is pivoted at l between the forked arms oit abracket attached to the seat frame. xThe Jfree end of latch member :30is turned nearly parallel to the bar 48, and a wedge actuated by a handlever 54 provides for a positive lock of the latch member 50 to the bari8 to hold the chair back rigidly to any adjusted position. Then thewedge is not actively employed the chair back may be moved freelyupwardly or forwardly and will be automatically held by the latch member5() against movement in a reverse direction due to the canting andbindingot the bar 4.8 in the slot in latch member 50. To lower the chairback the latch member :30 is lifted whereupon the bar #LS will movefreely down through the slot in latch member 50. The chair back may thusbe adjusted from a vertical to a horizontal position and rigidly lockedor automatically latched. Then the back is in a. substantiallyhorizontal position, it is also in substantially the same plane with thetop ot seat cushion or even inclined downwardly therefrom so that thetwo of them form an operating table or bed suitable to per'lorm minoroperations on children. lVhen the foot rest is elevated intosubstantially the same plane as the top ot the seat cushion the footrest, seat cushion and chair back together constitute a table supporttor an adult for minor operations.

An apron 56 is attached to the front ot' the seat trame and dependstherefrom. and a step or foot rest 57 rigidly attached to said apron. Ialso provide in addition to the foot rest 57 an adjustable toot rest,

which is preferably provided with two troughs or channels 5S) and (3()adapted respectively to support one or both toet or the lower portion otthe legs of a patient in a variety of positions suitable to be operatedupon as for instance by a chiropodist. The foot rest 58 is pivotallysupported at 6l in a forked bracket 62 carried by a vertical shank orstem 63, preferably of polygonal cross section. A slotted segment (5ftattached to the toot rest 58 at opposite ends and a (,flamping bolt (35enable the foot rest 58 to bc adjusted to different angular positionsand clamped rigidly to the yoke (S2. The shank (33 is nonrotatably andvertically adjustable in a cross bar 66 to which it may be rigidlyclamped by a` set screw (57. The cross bar GG is rigidly mounted uponrods (3S, and ('39 `which slide endwise in corresponding recessesy inthe foot rest member 57, where they are held by spring tension againsttoo :tree a movement in said recesses. The foot rest 5S may thus beadjusted horizontally to and from the sea-t frame through a considerablerange ot adjustment, and also adjusted vertically and to ditlerentangles ot inclination, whereby the foot ot' the pa tient may be causedto rest in one o't the channels 59 or 60, as shown in dotted line Fig.4;, with the :toot upwardly or down wardly directed from the seatcushion1 or with the lower portion of the leg supported in one of thechannels 59 or 60 and the entire toot overhanging the foot rest 5S. asmay be most convenient for the patient or operator.

Attached to the rear ot the upper portion of the chair back is a yokeshaped bracket 7() carrying two parallel horizontally positioned rods 7land 72. A carriage composed ot two sections 73 and 74 is mounted toslide horizontally on the rods 7l and 72. A clamping bolt 75 connectsthe. two carriage sections together, and when tightened serves to clampthe two carriage sections together, and also at the same time to clampthe shank 76 of a head rest rigidly to said carriage sections. The shank76 is adjustable to various positions vertically relative to saidcarriage sections, and also laterally with said carriage sectionswhereupon tightening ot a single bolt 75 clamps all the members rigidlyin position, and facilitates a wide range ot adjustment for the headrest and a quick adjustment thereof. A clamping bolt 77 serves to clamptwo bars 7S and 79 together face to tace. The bar 7 S is pivotallyattached at 80 to a yoke 81 which carries two head rest pads 82 and 88.The bar 79 is pivotally attached at 84 to the yolte 81. Bysliding'fbarsSandi9` upon greater varietyot f positions for the head The apparatusherein shown Vvand described 1s capable of considerable modili'cationWithin the scope offfthe claims WithoutI departing trom the spirit of myinventions llVliat I claim isi: 1`

l. A chair comprising a base provided with a cylinder, a, verticallyadjustable hydraulic` v'plunger n'iountdffin said 5 cylinder' andserving as a chair pedestal, an axle journaled to the upper end of saidplunger serving as a pump shaft and provided With a hand lever operableto actuate a hydraulic pump Within said plunger to raise and lower saidplunger, a chair seat member comprising a seat, back, and foot-rest,pivotally mounted upon and above said axle, a vertically disposedtoothed segment carried by said Vseat member, a latch bar carried bysaid pedestal and yieldingly actuated to normally engage one of theteeth of said segment, a hand lever adapted to retract said latch barwhen it is desired to adjust said seat lmember upon said axle, andresilient means to limit the movement of said chair seat member relativeto said plunger at opposite extremities of its movement.

2. A chair comprising a base provided with a cylinder, a verticallyadjustable hydraulic plunger mounted in said cylinder and serving as achair pedestal, a substantially horizontal axle journaled to the upperend of said pedestal and operable as a rockshatt to actuate a hydraulicpump located Within said pedestal, a chair seat rotatably mounted uponsaid rock-shaft relative to said pedestal to enable said chair seat tobe adjusted to different positions of inclination, a rack membercarriedV by and depending Ytrom said seat,`a pawl mounted upon saidpedestal and resiliently energized to normally engage saidr rack member,a hand lever journaled upon said rock-shaft and operable from theexterior of said seat to retract said paivl when it is desired to adjustsaid seat, and a hand lever operable from the exterior ofsaid seat toactuate said `rock-shaft and thereby operate Ysaid hydraulic pump. i*

3. A chair comprising a base provided with a cylinder', a verticallyadjustable hydraulic plunger mounted in Vsaid cylinder and serving as achair pedestal, a substantially horizontal axle journaled to the upperend of said pedestal and operable as a rockshaft to actuate' a hydraulicpump located Within said pedestal', a chair seatV rotatably n mountedupon said rock-shaft relative to said pedestal to enable said chair seatto'be adj usted to different positions of incl-ination, a rack membercarried by` and` depending from said.l seat, a. paivlfmounted pivotallyupon saidl pedestal and resilientlyenergizedi to normally. engagesaidra'clr member, means to yleldmglylimit the adjustment of said chairseat atv'opposite extremitiesot its` movement relative tothe pedestal,va hand lever operable from the exterioroiE said seat to retract Vsaidpawl: when` itis. desired to adjustsaidV seatyand a hand leveroperable..

from theicxterior of saidy seat to. actuate said rockshaft and therebyoperate said hydraulic pump.

A chair-comprising a ibase provided with a cylinder, a verticallyadjustable hydraulic plunger mounted in said cylinder and serving as achair pedestal, a substantiallyhorizontal axle journaled to the upperend of said pedestal and operable as a rockshalit to actuate a hydraulicpump located Within said pedestal, a chair seat rotatably mounted uponsaid rock-shaft relative to said pedestal to enable said chair seat tobe ,adjusted to different positions of inclination, a rack membercarried by and depending lrom said scat, a pawl mounted upon saidpedestal and resiliently energized to normally engage said rack member,a yokeshaped hand lever' journaled upon said rockshai't and operablefrom the exterior of said seat to retract said paivl When it is desiredto adjust said seat, and a hand lever operable from the exterior of saidseat to actuate said roch-shaft and thereby operate said hydraulic pump.

5. A chair coii'iprising a base. provided With a cylinder, a verticallyadjustable hydraulic plunger mounted in said cylinder and serving as achair pedestal, a substantially horizontal axle journaled to the upperend of said pedestal and operable as a rockshatt to actuate a hydraulicpump located Within said pedestal, a chair seat pivotally mounted uponand above said axle, a vertically disposed toothed segment carried bysaid seat, a latch bar carried by said pedestal and yieldingly actuatedto normally engage one of the teeth of said segment, a hand leveradapted to retract said latch bar when it is required to adjust saidseat upon said axle, and resilient means to limit the movement ot' saidchair seat at opposite extremities of Vits movement.

(i. A chair comprising a base provided with a cylinder, a verticallyadjusted hydraulic plunger mounted in said cylinder and serving as achair pedestal, a substantially horizontal axle journaledr to the upperend of said pedestal and operable as a rockshaitt to actuate a hydraulicpump located Within said pedestal, a seat, chair back, and ioot restpivotally mounted upon and above said axle, a vertically disposedtoothed segmentk carried by said seat, a latch bar `carried by saidpedestal and yieldingly actuated to normally engage'one of the teeth ofsaid segment, avhand lever adapted to retract said latch bar when it isrequired to adjust said seat upon said chair seat, and resilient meansto limit the movement of said axle at opposite extremities of itsmovement.

i 7. A chair comprising a base provided with a cylinder a verticallyadjusted hydraulic plunger mounted in said cylinder and serving as achair pedestal, an axle journaled to the upper end of said plunger andprovided with a hand lever operable to raise and lower said plunger, achair seat member comprising a seat, back, and foot rest, pivotallymounted upon and above said axle, a vertically disposed toothedsegment'. carried by said seat member, a latch bar carried by saidpedestal and yieldingly actuated to normally engage one of the teeth ofsaid segment, a hand lever adapted to retract said latch bar when it isrequired to adjust said seat upon said axle, and resilient means tolimit the movement of said chair seat FREDERICK KOENIGKRAMER.

Certificate of Correction.

It is hereb7 certified that in Letters Patent No. 1,542,508, grantedJune 16, 1925,

upon the application of Frederick Koenigkralnen, of Cincinnati, Ohio,for an improvement in Chairs, errors appear in the printed specificationrequiring` correction as follows: Page 4, line 5, claim 6, for the Wordschair seat7 read Carle, and line 6, for the word axle read Chair seat;and that the said Letters .Patent should be read with these corrections:therein that the saine may conform to the record of the case in thePatent Office.

Sign-ed and sealed this 21st day of July, A. D. 1925.

[SAL] KARL FENNING,\

Acting 00m/missione?"- of Patents.

